Piston for internal-combustion engines



5111;; 1:922. mfiwm A. WENTUN PISTON FOR INTERNAL COMBUSTION ENGINES Filed April 25. 1919 2 Sheets-Sheet 1 AQ WINTQN PISTON FOR INTERNAL COMBUSTION ENGINES July 31, 1923.

Filed April 25, 1919 r 2 Sheets-Sheet 2 fig. Z.

-- JZZZ/EZZZJJZ' Patented July 31, 1923.

warren sraras ALEXANDER WIN'ION,

or LAKEWOOD, OHIO.

PISTON non INTERNAL-COMBUSTION nnernns.

Application filed April '25,.

T allwhom it may concern:

Be it known'that I, ALEXANDER lVINToN,

a citizen of the United States, residing at Lakewood, in the county of Cuyahoga and State of Ohio, have invented certain new and useful 'Improvements in Pistons for Internal-Combustion Engines, of which the following is a specification.

This invention relates to internal combustion motors and particularly to means for cooling the head of the piston. The heat generated in the explosion chamber of internal combustion motors is so in tense that it often affects the head of the piston to an extent such that it weakens and breaks,. or is bulged downward with obvious disastrous results. The present invention is designed to avoid this result by projecting cool air against the inner surface of the piston and against radiating fins provided on the inner side of its head.

In supplying thecooling air to the piston, it is provided adjacent to its head with a cooling chamber in communication with an inlet port and a discharge port which are adapted to register with inlet and discharge ports in the cylinder wall, such cylinder ports being located such'that the registry thereof with the piston ports is established only when the' piston is at the outer end of its strokes. In this way thereis a circulation of air through the piston. A battle is provided in the piston and in the path of the air to produce the proper circulation.

The invention may be further briefly summarized as consisting in the construction and combination of parts hereinafter set forth in the following description, drawings, and claims. I

Referring to drawings, Fig. 1 isa vertical section of a cylinder with piston therein, showing the arrangement for supplying a cooling medium to the latter.- F ig. 2 is a section upon line 2-2 of Fig. 1, and Fig. 3

is a section upon line 3 3 of Fig. 1.

In the drawings, 1 represents a suitable support which is preferably part .of the frame or crank case. Engaging this support is a flange 2, forming a part of a cylinder 3. The cylinder supports a head 4, provided with suitable valve mechanism illustrated but not described, since it forms no special part of the invention.

The cylinder 1, near its lower end-is provided with an inlet port 5 for receiving a pipe 6 adapted to supply a cooling me- 5, is another 1919. Serial No. 292,686.

dium, such as air. On the opposite side of the cylinder and in alignment with port port 7, receiving a discharg pipe 8.

W'ithinthe cylinder 3, is piston 9, provto 1 vided with the usual connecting rod 10.

The piston 9 isprovidedwith ahead 11,

having inwardly extending radiating flanges 1 or ribs 12, which are circular and are arranged concentric with respect to each other. Below these flanges 12,'is a horizontal diaphragm or wall 13, having-a rectangular opening 14 therein, as shown in Fig. 2. Extending upward through the opening 14 and arranged diagonally in' said opening, is a bafile'plate 15, forming a part of a plate" 16, which latter is secured against the under' side of the diaphragm or wall 13 in any suitablemannen-as. by suitable screws 17 extending through the plate 16 and threaded into the diaphragm. or wall 13. The cooling chamber formed betweenthediaphragm or wall 13 and the cylinder head, communicates by anopening 18 with a longitudinal recess 19, formed in the outer wall of the piston. This recess 19 is arranged so that when this piston is at the lower end of its'stroke' the recess 19 will register with, the port 5 and permit the passage 'of the cooling medium from' this port through this. opening 18 into the cooling chamber within the piston. Opposed to' the opening 18, is a discharge in like manner communicating with a lonport 20, I

gitudinal discharge recess 21, which .is' adapted, when the piston isat the lower end of its'stroke, to register with the port 7, and permit the discharge of the cooling 'medium from the cooling chamber in the piston to: the discharge pipe 8. The plate 16 and bafiie 15 are removable by unscrewing the screws 17 to clean out the cooling chamber ii the pistonand remove-any deposits of foreign matter, therein, such as baked or coked lubricant, carbon. or the like.

It will be seen from the foregoing description that as the piston reaches the lower end of its stroke, the cooling medium,

which is preferably under pressure, is free to ass through the cooling chamber arid is baiflcd by the baflie plate 15 and thereby circulates about the radiating flanges or ribs 12. In this way the head of the piston is kept cool and is prevented from becoming so heated that it will be deformed by the extreme pressure within the cylinder.

air, which ispreferabIy under pressure so The cooling medium usually employed I that it will pass through cool and perform its function quickly.

cylinder provided J-io cooling chamber adjacent with said chamber and y the atmosphere,

20' angle to a line connecting said piston having ports communicating with said inlet and discharge ports, means for supplyingcooling medium under pressure to the inlet port of said 0 linder, means ,com-mumcating with said disc arge port for 4 conducting the heated cooling medium to and a bafiie plate in said lying in a plane at an cooling chamber the piston porte cylinder,

to the-piston head,

adapted tdrefgister eesnee .2. In an internal combustion engine; a

cylinder provided with-inlet and discharge ports near one end,

cooling chamber adjacent to the piston a piston within said, a wall in said piston forming ahead,- said piston having ports commum- .catingwith said chamber and adapted to register with said inlet and discharge ports, means for supplying cooling medium-under pressure tothe 1nlet port ofsaid cylinder,

means communicating with said discharge' ort for conducting'the dium to the atmosphere, said piston wall having a. relatively" large openmg,

removable plate closing said openingand carrying a baffie member in said chamber.

In testimony whereof I affix my signature. y

ALEXANDER wnvro n' heated cooling meand a 

